Extruding machine



April 20, 1937. v. E. RoYLE 2,078,100

EXTRUDING MACHI NE Filed June` 25, 1935 2 Sheets-Sheet l [./Vl/ENTOR ATTORNE V5 April 20, 1937. v` E. RoYLE EXTRUDIKNG MACHINE 2 Sheets-Sheet2 Filed June 25, 1955 INYENTOR Patented Apr. 20, 1937v UNITED STATESPATENT OFFICE 'l' Claims.

This invention relates to an improvement in extruding machines and hasfor an object to provideV a strainer head which is adapted for thoroughand expeditious operation upon mal terials oi' varying characteristics.and which includes an improved means for adjusting, cleaning andreplacing the parts and assembling them in operative position, as wellas for disassembling the same.

lo Another object consists in providing a strainer head dividedtransversely into two members hinged together and having mechanicallyoperated means for quickly locking'and unlocking the members in thehead.

15 Another object consists in providing a strain er head having meansmounted on the movable member for cutting the material transversely,when so desired. after it has passed through the head, which cuttingmeans is iixedly mounted at its outer extremity to extend diametricallyacross the line of extrusion and` actuated by a motor. i

another obiect'consists in certain improve-- ments in the i'orm,construction and arrange- .w merit oi the several parts whereby theabove named and other objects may effectively be attained. i i

Machines of this character are designed to operate during' the processof reclaiming the rub- 30 ber, upon rubber compounds that includevarious substances, and these substances vary greatly in consistency andindividual characteristics.

Consquently, it is necessary to provide a strainery head which is notonly strong and eilective. but 35 ,which may be rapidly assembled anddisassembled. and rendered proof against serious injury arising trom anunusual strain duetto the presv ence oi some foreign matter undergoingthe operation. i

40 A practical embodiment of my invention is represented in theaccompanying drawings, in

which- Fig. i represents a front elevatlonoi a head Fig. represents avertical `section taken inA the plane oi the line V--V ci Fig. 1,looking in the direction of the arrows;

55 Fig. 6 represents a detail horizontal section,

taken in the plane of the line VI--VI of Fig. 3, looking in thedirection of the arrows; and

t Fig. 7 represents a detail horizontal section taken in the plane ofthe line VII-VII oi Fig. 5, looking in the direction of the arrows.

'Ihe cylinder of the extruding machine, ot which the iront portion onlyis shown, is denoted by i and its bore liner by I. The usual stock screwor plodder 3 is housed within the liner 2 of the cylinder and projectstherefrom 10 for cooperation with the fixed member l of the strainerhead. 'This fixed member l is secured in position on the cylinder I bymeans ot a series of stud bolts 5 whichextend outwardly from thecylinder and register with holes in 15 the face plate 6 of the member 4.Nuts l are provided for threading on the bolts 5 in order to secure theface plate 6 and hence` the member 4 in position on the cylinder. `Themember 4 includes a liner 8 which is shouldered at 8 to register with o.reduced iiange Il that projects forwardly from the bore liner 2, asshownin Fig. 5. A suitable washer il is disposed be`A tween the cylinder land the bore liner 2 on one hand and the faceplate of the member 4 on 25the other hand.

Suitable passages I2 are disposed in the mem` ber 4 for the circulationci a temperature con# trolling medium in a manner well understood` inthe art. The interior of the member l immediately in advance ofthe liner8 expands or ilares. abruptly to a shoulder ll, in which flared chamberthe free end `of the stockscrew ac` tuates.

`The movable member ci the head is denoted by I4 and hasits innercircumference l5, fora short distance, substantially equal to the innerdiameter of the shoulder It of the ilxedmemn ber l, than it is ilaredforwardly and outwardly at i., though its-dare is not as abrupt as thatoi the interior oi the fixed member I between the end oi' the liner andthe shoulder Il. The movable member M has also formed on its innercircumterence i5, It vertical partitions Il, Il and connectinghorizontal .partitions I0, 20, which serve to divide the materialpassing therethrough into tour sections. Each partition is tapered invwardly at 2l, thence outwardly atA 22 to allow the plastic material tobe freely extruded.

'Ihe inner'suriace of the movable member Il 5o is recessed at 23 for thereception o! a relatively thin foraminous plate 24, `the perforations inwhich are denoted by 25. This plate 24 is secured imposition in the`recess 23 by screws 28 and arrangedto abut the vertical and horizontalpartitions which prevent the plate from buckling or becoming distortedby the action of the material being forced away from the stock screw.

A screen or strainer 21 is interposed between the shoulder I3 and theplate 24 when the members 4 and I4 are assembled.

The member I4 ls adapted to be swung into and out of engagement with themember 4 by means of a. hinge formed by trunnions 28, 29 on the arm 30which extends outwardly and forwardly on the side of the fixed member 4,and similar trunnions 3|, 32 are formed integral with the arms 33, 34,respectively, on the movable member I4. Trunnions 28, 23, 3|, 32 arearranged in vertical alinement so as to receive' a hinge pin journaledtherein.

The movable member I4 is removably secured to the fixed member 4 bymeans of an annular ring 36 formed of a pair of segments 31, 33 securedtogether by bolts 39, 40. This annular ring36 has an interiorannulariiange 4I on its rear transverse face, which is arranged tooscillate in a peripheral groove 42 in the outer end of the member 4, asshown in Fig. 5. The outer transverse face of the ring '36 is providedwith a series of interior radial projections 43 which are designedtomate with a series oi exterior radial projections 44 formed adjacent theinner transverse face of the movable member I 4. These projections 43,44 have their sides cut on radial lines and theprojections 44 are ofsuch size and form that they can pass between the projections 43 on thering 36, as clearly shown in Fig. 4.

This -construction enables the movable member I4 to be swung toward andaway from the fixed member 4, during which movement the projections 44will pass between the' projections 43 on the ring 33.

In order to conveniently actuate the ring 36 so that the projections 43may be brought into and out of overlapped relation with the projections44 on the member I4, I provide a hand operated mechanism comprising abracket 4b secured to the fixed member 4 at 43 (see Fig. 5), a driveshaft 41 journaled in the bracket. a worm 43 fast on the drive shaft,and a worm wheel 43 coacting with saidworm and secured on a shaft 40also journaleddn the bracket vat right angles to the drive shaft 41, onwhich shaft 53 is xed a pinion 5I arranged to mesh with a rack 52 faston the segment '38 of the ring 36.

To rotate the shaft 41 toactuate the parts, a hand wheel 53 is fixed onthe shaft 41 and provided with a handle 54. If desired, the hand wheel53 may be rotated by means of a bar (not shown) which may be insertedinsockets 55 arranged in the periphery of the hand wheel 33. Thus, itwill be seen that if the hand wheel 53 is moved in the direction of thearrow shown in Figs. l, 2 and 3 to rotate the shaft 41, the worm 43which is mounted on the shaft will actuate the worm wheel 49'which, inturn, will move its shaft 50 upon which the pinion 5I is xed, and, asthe pinion is in engagement with the rack 52 fast on the segment 33 ofthe ring 38, it will bel moved to the position shown in Fig. 4. In thisposition the projections 43 are located between the projections 44 andthe member i4 free to be swung outwardly away from the member 4 to theposition shown in dotted outline in Fig. 2.

Inorder that the screen 21 and foraminous plate 24 carried by themovable member I 4 will be brought into intimate contact with theshoulder I3 of theiixed member. each of the surfaces of thepmjections43,44, which'contact by the rotation of the ring 36, isprovided with a slight inclination, so that, as the projections 43 areslid onto the projections 44, a wedge-like action takes place and themember I4 will be `moved longitudinally toward the fixed member 4. Tocom- 5 transversely at predetermined intervals comprises a bar E0extending diametrically across the end `of the member i4 and provided atits outer exl` tremities with plates 82, 63 secured to a ring gear 64fitted to rotate in an annular recess 65 in the -outer end of themovable member I4. This ring gear 64 is maintained in position by aretainer ring E6 secured to the member I4 by screws 31. 2

The bar t@ is also provided with a centrally disposed hub t@ which isfulcrumed on a pin I3 having its inner end screwed into the junction ofthe :vertical and horizontal partitions I1, Il,

B3, and` 28, respectively, while the outer end is 2 arranged te receivea'collar 10 pinned thereto at 1I. This bar 60 is-further provided withblades 12, 13 having their cutting edges'disposed in oppositedirections, so that, when the ring gear 34 is rotated in its recess 65,the blades 12, 3i

13 will move in opposite arcuate directions around the pin S3.

The ring gear 64 is controlled and actuated by a chain 'I4 whichreceives its motion from a pinion l5 fast on the shaft 13 of an electricmotor 11 35 mounted on a bracket 13. IThis bracket 13 is arranged toreceive the upper end of the hinge pin 35 and is secured to the trunnion3l of the arm on the movable member I4 by dowels 13 (see Fig. 3). vbracket 13 with its motor and adjacent mechawill be maintained inoperative position whether the members of the head are in open orclosedposition and will be moved on the hinge pin with the movable member I4.

In operation: The material to be strained, such, for instance, asmasticated old rubber products andthe like, is urged forwardly by thestock screw '3 into the ared chamber in the fixed member 4 oi' the head,then through the screen 2l and holes 2b in the plate 24, and thenthrough the ared outlets in the movable member I4 where it is dividedlongitudinally into four sections by the vertical and horizontalpartitions.

The age of the material from the stock screw 5l into the adjacentchamber is more rapid than its movement from the plate 24 into thedivided outlet because of the obstruction provided by the plate. Theprovision of the abruptly flared chamber at the end of the screw and theless el abruptly flared outlet conform the device to this condition.Additionally, the fact that the screen is of much greater crosssectional area than the screw receiving portion tends to increase theoutput of the device by permitting the screw 6:

to work out or near its capacity instead of hampering it by backpressure on the material. After 'a certain amoimt of material has beenstrained, it may be found desirous to clean or remove the screen orplate, and, in order to 71 plate i3 il Thus, it will be seen that the 40wheel 4l fast on the shaft I0 carrying the pinion each other, themovable member il is, tree to be swung on its hinge pin l5 to theposition shown in dotted outline in Fig. 2. In swinging the movablemember `I4 away from the xed member l, the full surfaces of the screen21 and plate 24 are exposed, so that any cleaning or removal which maybe required is readily and easily accomplished. After the screen andplate have been cleaned or renewed and returned totheir formerpositions, the movable member is again swung on its hinge pin intoengagement with the ilxed member 4 and the hand wheel 53 manipulated sothat the ,shaft 41, together with the worm I8, worm wheel 48 and shaft50, will actuate the pinion 5i and cause it, by engagement with thesegment 52, to rotate the ring 36, which, in turn. brings the plates 5Bon the projections I3 slidably into contact with the plates II on theprojections 44 of the movable member I I. With the inclined surfaces ofthe plates on the projections fully in contact, the movable member Ilwill be locked to the fixed member l and the parts again placed incondition for iurther operation.

When desired, the material extruded from the outlets in the movablemember may be cut transversely into predetermined lengths by the blades12, 13 on the rotatable bar 80. To actuate the bar, the motor 11 isenergized and the pinion 15 rotated to drive the ring gear through thechain 1I, to which ring gear the plates 62, 63 at the outer ends of thebar 8l are secured.

Thus, it will be seen that the operative force or movement of the ringgear M acts upon the ends oi' the bar 6I, moving the blades 12, "I3 inopposite arcuate directions and about the pin 69 located at the junctionof the vertical and horizontal partitions, thereby Veffecting asmoothness and celerity in the performance of the cutting operation.

'Ihe construction above described enables the members forming thestrainerhead to be transversely separated and replaced in an expeditiousmanner, while the readjustment of the parts in 'the exactly desiredpositions is readily assured.

It will vhe understood that various changes may be resorted to in theform, construction and arrangement of the several parts without depart-`ing from the spirit and scope oi my invention,

and hence I do not intend to be limited to the details herein shown anddescribed except as they may be included in the claims.

What I claim is:

1. In a machine for extruding plastic material in a straight line, thecombinations of a head housing a stock screw, a member hinged to swinginto and out oi engagement with said head, said member being providedwith exterior radial projections on its inner end, an annular devicerotatable on said head and provided with interior radial projections onits inner periphery arranged to engage said exterior projections on theswinging member, and means for actuating in a straight line, thecombination of a. head housing a stock screw. said head being providedwith an annular groove adjacent its outer end. a member hinged to swinginto and out of engagement with said head, said member being providedwith exterior radial projections on its inner end, an annular devicerotatablein said groove in the head and provided with interiorV radialprojections on its outer end arranged to engage said exteriorprojections on the swinging member, and means for actuating said annulardevice i'or moving said interior projections into and out of engagementwith the exterior projections .for locking and unlocking the swingingmember to the head.

3. In a machine for extruding plastic material in a straight line, thecombination of a head housing a stock screw, said head being providedwith an annular groove adjacent its outer end, a member hinged to swinginto and out of engagement with said head, said member being providedwith exterior radial projections on its inner end, an annular devicerotatable in said groove in the head and provided with interior radialprojections on its outer end arranged to engage said exteriorprojections on the swinging member, each of said interior and exteriorprojections being provided with a removable face plate, the coactingcontacting surfaces of said plates being inclined, and means foractuating said annular device for moving its interior projections andinclined plates into and out of engagement with the inclined plates onthe exterior projections for locking and unlocking the swinging memberto the head.

4. In an extruding machine, the combination of a head housing a stockscrew, a member hinged to said head, and having an opening therethroughfor the extrusion of the material in a straight line, an annular supportmounted at the outer end of said swinging member, a cutting deviceilxedly secured at both ends to said annular support, and means carriedby the hinge element of .the swinging member for rotating said annularsupport so as to twist said 'cutting device about and at right angles tothe longitudinal axis of extrusion for periodically trans verselycutting vthe extruded material upon a l diametrical line.

5. In an extruding machine, the combination of a. head housing a stockscrew, a member hinged to said head and having an opening therethroughfor the extrusion of the material in a. straight line, an annularsupport mounted at the outer end of said swinging member, a cuttingdevice iixedly secured at both ends to said annular support, and motordriven means carried by the hinge element of the swinging member forrotating said annular support so as to twist said cutting device aboutand at right angles to the longitudinal axis of extrusion iorperiodically transversely cutting the extruded material upon adiametrical line. A

6. In an extruding machine, the combination of a head housing a stockscrew and having arms forming one element of a hinge, a member coactingwith said head and having arms enacting with the arms'on said head andforming the other element of the hinge. said member having an openingtherethrough for the extrusion of the material in a straight line, anannular support mounted at the outer end of said swinging member, acutting device xedly secured at both ends to said support, and meanscarried by the arms on the swinging member `for rotating said annu#material in a straight line, an annular support` mounted at the outerend of said swinging member, a cutting device xedly secured at both endsto said support, and motor driven means carried by the arms on theswinging member for rotating said annular support so asto twist saidcutting device about and at right angles to the longitudinal axis ofextrusion for periodically transversely cutting the extruded materialupon adiametrical line;

VERNON E. ROYLE.

